Ok guys does anyone know what spark plugs to use to replace the oem plugs on a 2002 20v riders edition?
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running a 350 mag -
What's in there now? I have a 97 but my Merc. manual shows these plugs for all engines. Maybe someone with your same engine will chime in?
AC MR43T
Champion RV15YC4
NGK BR6FS
Torque 11 ft.lbs. Gap .040 in. (1.0 mm)Mike Allen, Tigé owner since 1997Comment
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Spark Plugs in the EFI are as follows:
AC Delco MR43LTS (longer reach than the 43t, which will carbon up in efi motors)
NGK BPR6EFS
DO NOT USE CHAMPIONS!!!!!!!!! They will break, always.
Also, on every mercruiser the spark plug model for that engine is listed on the identification cover as well as the required octane fuel rating.Fixing everyone elses boat just so I can use mine...Comment
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